DMLabel is now a PetscObject, but the struct name does not match the usual conventions, it should be _p_DMLabel, but instead:
include/petsc/private/dmlabelimpl.h:struct _n_DMLabel {
include/petscdmlabel.h:typedef struct _n_DMLabel *DMLabel;
--
Lisandro Dalcin
============
Research Scientist
Extreme Computing Research Center (ECRC)
King Abdullah University of Science and Technology (KAUST)
http://ecrc.kaust.edu.sa/
